5 * 'tty.h' defines some structures used by tty_io.c and some defines.
10 #include <linux/major.h>
11 #include <linux/termios.h>
12 #include <linux/workqueue.h>
13 #include <linux/tty_driver.h>
14 #include <linux/tty_ldisc.h>
15 #include <linux/mutex.h>
17 #include <asm/system.h>
21 * (Note: the *_driver.minor_start values 1, 64, 128, 192 are
22 * hardcoded at present.)
24 #define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
25 #define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
28 /* line disciplines */
35 #define N_X25 6 /* X.25 async */
37 #define N_MASC 8 /* Reserved for Mobitex module <kaz@cafe.net> */
38 #define N_R3964 9 /* Reserved for Simatic R3964 module */
39 #define N_PROFIBUS_FDL 10 /* Reserved for Profibus */
40 #define N_IRDA 11 /* Linux IrDa - http://irda.sourceforge.net/ */
41 #define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */
42 /* cards about SMS messages */
43 #define N_HDLC 13 /* synchronous HDLC */
44 #define N_SYNC_PPP 14 /* synchronous PPP */
45 #define N_HCI 15 /* Bluetooth HCI UART */
46 #define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */
47 #define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */
50 * This character is the same as _POSIX_VDISABLE: it cannot be used as
51 * a c_cc[] character, but indicates that a particular special character
52 * isn't in use (eg VINTR has no character etc)
54 #define __DISABLED_CHAR '\0'
57 struct tty_buffer *next;
59 unsigned char *flag_buf_ptr;
64 /* Data points here */
65 unsigned long data[0];
69 struct delayed_work work;
71 struct tty_buffer *head; /* Queue head */
72 struct tty_buffer *tail; /* Active buffer */
73 struct tty_buffer *free; /* Free queue head */
74 int memory_used; /* Buffer space used excluding free queue */
77 * When a break, frame error, or parity error happens, these codes are
78 * stuffed into the flags buffer.
86 #define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
87 #define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
88 #define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
89 #define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
90 #define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
91 #define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])
92 #define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])
93 #define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])
94 #define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
95 #define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
96 #define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
97 #define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])
98 #define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])
99 #define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])
100 #define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])
101 #define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])
102 #define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
104 #define _I_FLAG(tty,f) ((tty)->termios->c_iflag & (f))
105 #define _O_FLAG(tty,f) ((tty)->termios->c_oflag & (f))
106 #define _C_FLAG(tty,f) ((tty)->termios->c_cflag & (f))
107 #define _L_FLAG(tty,f) ((tty)->termios->c_lflag & (f))
109 #define I_IGNBRK(tty) _I_FLAG((tty),IGNBRK)
110 #define I_BRKINT(tty) _I_FLAG((tty),BRKINT)
111 #define I_IGNPAR(tty) _I_FLAG((tty),IGNPAR)
112 #define I_PARMRK(tty) _I_FLAG((tty),PARMRK)
113 #define I_INPCK(tty) _I_FLAG((tty),INPCK)
114 #define I_ISTRIP(tty) _I_FLAG((tty),ISTRIP)
115 #define I_INLCR(tty) _I_FLAG((tty),INLCR)
116 #define I_IGNCR(tty) _I_FLAG((tty),IGNCR)
117 #define I_ICRNL(tty) _I_FLAG((tty),ICRNL)
118 #define I_IUCLC(tty) _I_FLAG((tty),IUCLC)
119 #define I_IXON(tty) _I_FLAG((tty),IXON)
120 #define I_IXANY(tty) _I_FLAG((tty),IXANY)
121 #define I_IXOFF(tty) _I_FLAG((tty),IXOFF)
122 #define I_IMAXBEL(tty) _I_FLAG((tty),IMAXBEL)
123 #define I_IUTF8(tty) _I_FLAG((tty),IUTF8)
125 #define O_OPOST(tty) _O_FLAG((tty),OPOST)
126 #define O_OLCUC(tty) _O_FLAG((tty),OLCUC)
127 #define O_ONLCR(tty) _O_FLAG((tty),ONLCR)
128 #define O_OCRNL(tty) _O_FLAG((tty),OCRNL)
129 #define O_ONOCR(tty) _O_FLAG((tty),ONOCR)
130 #define O_ONLRET(tty) _O_FLAG((tty),ONLRET)
131 #define O_OFILL(tty) _O_FLAG((tty),OFILL)
132 #define O_OFDEL(tty) _O_FLAG((tty),OFDEL)
133 #define O_NLDLY(tty) _O_FLAG((tty),NLDLY)
134 #define O_CRDLY(tty) _O_FLAG((tty),CRDLY)
135 #define O_TABDLY(tty) _O_FLAG((tty),TABDLY)
136 #define O_BSDLY(tty) _O_FLAG((tty),BSDLY)
137 #define O_VTDLY(tty) _O_FLAG((tty),VTDLY)
138 #define O_FFDLY(tty) _O_FLAG((tty),FFDLY)
140 #define C_BAUD(tty) _C_FLAG((tty),CBAUD)
141 #define C_CSIZE(tty) _C_FLAG((tty),CSIZE)
142 #define C_CSTOPB(tty) _C_FLAG((tty),CSTOPB)
143 #define C_CREAD(tty) _C_FLAG((tty),CREAD)
144 #define C_PARENB(tty) _C_FLAG((tty),PARENB)
145 #define C_PARODD(tty) _C_FLAG((tty),PARODD)
146 #define C_HUPCL(tty) _C_FLAG((tty),HUPCL)
147 #define C_CLOCAL(tty) _C_FLAG((tty),CLOCAL)
148 #define C_CIBAUD(tty) _C_FLAG((tty),CIBAUD)
149 #define C_CRTSCTS(tty) _C_FLAG((tty),CRTSCTS)
151 #define L_ISIG(tty) _L_FLAG((tty),ISIG)
152 #define L_ICANON(tty) _L_FLAG((tty),ICANON)
153 #define L_XCASE(tty) _L_FLAG((tty),XCASE)
154 #define L_ECHO(tty) _L_FLAG((tty),ECHO)
155 #define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
156 #define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
157 #define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
158 #define L_NOFLSH(tty) _L_FLAG((tty),NOFLSH)
159 #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
160 #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
161 #define L_ECHOPRT(tty) _L_FLAG((tty),ECHOPRT)
162 #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
163 #define L_FLUSHO(tty) _L_FLAG((tty),FLUSHO)
164 #define L_PENDIN(tty) _L_FLAG((tty),PENDIN)
165 #define L_IEXTEN(tty) _L_FLAG((tty),IEXTEN)
168 struct signal_struct;
170 * Where all of the state associated with a tty is kept while the tty
171 * is open. Since the termios state should be kept even if the tty
172 * has been closed --- for things like the baud rate, etc --- it is
173 * not stored here, but rather a pointer to the real state is stored
174 * here. Possible the winsize structure should have the same
175 * treatment, but (1) the default 80x24 is usually right and (2) it's
176 * most often used by a windowing system, which will set the correct
177 * size each time the window is created or resized anyway.
181 struct tty_operations;
185 struct tty_driver *driver;
186 const struct tty_operations *ops;
188 struct tty_ldisc ldisc;
189 struct mutex termios_mutex;
190 spinlock_t ctrl_lock;
191 /* Termios values are protected by the termios mutex */
192 struct ktermios *termios, *termios_locked;
194 struct pid *pgrp; /* Protected by ctrl lock */
198 struct winsize winsize; /* termios mutex */
199 unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
200 unsigned char low_latency:1, warned:1;
201 unsigned char ctrl_status; /* ctrl_lock */
202 unsigned int receive_room; /* Bytes free for queue */
204 struct tty_struct *link;
205 struct fasync_struct *fasync;
206 struct tty_bufhead buf; /* Locked internally */
207 int alt_speed; /* For magic substitution of 38400 bps */
208 wait_queue_head_t write_wait;
209 wait_queue_head_t read_wait;
210 struct work_struct hangup_work;
213 struct list_head tty_files;
215 #define N_TTY_BUF_SIZE 4096
218 * The following is data for the N_TTY line discipline. For
219 * historical reasons, this is included in the tty structure.
220 * Mostly locked by the BKL.
223 unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
224 unsigned char closing:1;
225 unsigned short minimum_to_wake;
226 unsigned long overrun_time;
228 unsigned long process_char_map[256/(8*sizeof(unsigned long))];
233 unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
235 unsigned long canon_head;
236 unsigned int canon_column;
237 struct mutex atomic_read_lock;
238 struct mutex atomic_write_lock;
239 unsigned char *write_buf;
241 spinlock_t read_lock;
242 /* If the tty has a pending do_SAK, queue it here - akpm */
243 struct work_struct SAK_work;
246 /* tty magic number */
247 #define TTY_MAGIC 0x5401
250 * These bits are used in the flags field of the tty structure.
252 * So that interrupts won't be able to mess up the queues,
253 * copy_to_cooked must be atomic with respect to itself, as must
254 * tty->write. Thus, you must use the inline functions set_bit() and
255 * clear_bit() to make things atomic.
257 #define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */
258 #define TTY_IO_ERROR 1 /* Canse an I/O error (may be no ldisc too) */
259 #define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */
260 #define TTY_EXCLUSIVE 3 /* Exclusive open mode */
261 #define TTY_DEBUG 4 /* Debugging */
262 #define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */
263 #define TTY_PUSH 6 /* n_tty private */
264 #define TTY_CLOSING 7 /* ->close() in progress */
265 #define TTY_LDISC 9 /* Line discipline attached */
266 #define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
267 #define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
268 #define TTY_PTY_LOCK 16 /* pty private */
269 #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
270 #define TTY_HUPPED 18 /* Post driver->hangup() */
271 #define TTY_FLUSHING 19 /* Flushing to ldisc in progress */
272 #define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */
274 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
276 extern void tty_write_flush(struct tty_struct *);
278 extern struct ktermios tty_std_termios;
280 extern int kmsg_redirect;
282 extern void console_init(void);
283 extern int vcs_init(void);
285 extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
286 const char *routine);
287 extern char *tty_name(struct tty_struct *tty, char *buf);
288 extern void tty_wait_until_sent(struct tty_struct * tty, long timeout);
289 extern int tty_check_change(struct tty_struct * tty);
290 extern void stop_tty(struct tty_struct * tty);
291 extern void start_tty(struct tty_struct * tty);
292 extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
293 extern int tty_unregister_ldisc(int disc);
294 extern int tty_register_driver(struct tty_driver *driver);
295 extern int tty_unregister_driver(struct tty_driver *driver);
296 extern struct device *tty_register_device(struct tty_driver *driver,
297 unsigned index, struct device *dev);
298 extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
299 extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
301 extern void tty_write_message(struct tty_struct *tty, char *msg);
302 extern int tty_put_char(struct tty_struct *tty, unsigned char c);
303 extern int tty_chars_in_buffer(struct tty_struct *tty);
304 extern int tty_write_room(struct tty_struct *tty);
305 extern void tty_driver_flush_buffer(struct tty_struct *tty);
306 extern void tty_throttle(struct tty_struct *tty);
307 extern void tty_unthrottle(struct tty_struct *tty);
309 extern int is_current_pgrp_orphaned(void);
310 extern struct pid *tty_get_pgrp(struct tty_struct *tty);
311 extern int is_ignored(int sig);
312 extern int tty_signal(int sig, struct tty_struct *tty);
313 extern void tty_hangup(struct tty_struct * tty);
314 extern void tty_vhangup(struct tty_struct * tty);
315 extern void tty_unhangup(struct file *filp);
316 extern int tty_hung_up_p(struct file * filp);
317 extern void do_SAK(struct tty_struct *tty);
318 extern void __do_SAK(struct tty_struct *tty);
319 extern void disassociate_ctty(int priv);
320 extern void no_tty(void);
321 extern void tty_flip_buffer_push(struct tty_struct *tty);
322 extern speed_t tty_get_baud_rate(struct tty_struct *tty);
323 extern speed_t tty_termios_baud_rate(struct ktermios *termios);
324 extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
325 extern void tty_termios_encode_baud_rate(struct ktermios *termios, speed_t ibaud, speed_t obaud);
326 extern void tty_encode_baud_rate(struct tty_struct *tty, speed_t ibaud, speed_t obaud);
327 extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
328 extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
330 extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
331 extern void tty_ldisc_deref(struct tty_ldisc *);
332 extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
334 extern struct tty_ldisc *tty_ldisc_get(int);
335 extern void tty_ldisc_put(int);
337 extern void tty_wakeup(struct tty_struct *tty);
338 extern void tty_ldisc_flush(struct tty_struct *tty);
340 extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
341 extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
342 unsigned int cmd, unsigned long arg);
343 extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
344 extern dev_t tty_devnum(struct tty_struct *tty);
345 extern void proc_clear_tty(struct task_struct *p);
346 extern struct tty_struct *get_current_tty(void);
348 extern struct mutex tty_mutex;
350 extern void tty_write_unlock(struct tty_struct *tty);
351 extern int tty_write_lock(struct tty_struct *tty, int ndelay);
352 #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))
357 extern struct tty_ldisc tty_ldisc_N_TTY;
361 extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
363 extern void tty_audit_exit(void);
364 extern void tty_audit_fork(struct signal_struct *sig);
365 extern void tty_audit_push(struct tty_struct *tty);
366 extern void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid);
368 static inline void tty_audit_add_data(struct tty_struct *tty,
369 unsigned char *data, size_t size)
372 static inline void tty_audit_exit(void)
375 static inline void tty_audit_fork(struct signal_struct *sig)
378 static inline void tty_audit_push(struct tty_struct *tty)
381 static inline void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid)
387 extern int n_tty_ioctl(struct tty_struct * tty, struct file * file,
388 unsigned int cmd, unsigned long arg);
392 extern void serial_console_init(void);
396 extern int pcxe_open(struct tty_struct *tty, struct file *filp);
400 extern void console_print(const char *);
404 extern int vt_ioctl(struct tty_struct *tty, struct file * file,
405 unsigned int cmd, unsigned long arg);
407 #endif /* __KERNEL__ */